Physics Equations

Question 1

Equation for Weight

Answer 1

Weight = mass x gravitational field strength
W=mg

Question 2

Equation for Work Done

Answer 2

Work Done = force x distance (along the line of action of the force)

Question 3

Equation for the Force applied to a spring

Answer 3

Force Applied to a Spring = spring constant x extension

Question 4

Equation for the Moment of a Force

Answer 4

Moment of a Force = Force x Distance (normal to direction of force)

Question 5

Equation for Pressure involving force and area

Answer 5

Pressure = Force normal to a surface / Area of that surface

Question 6

Equation for the Distance Travelled

Answer 6

Distance Travelled = speed x time

Question 7

Equation for Acceleration

Answer 7

Acceleration = Change in Velocity / Time Taken

Question 8

Equation for Resultant Force

Answer 8

Resultant Force = Mass x Acceleration

Question 9

Equation for Momentum

Answer 9

Momentum = Mass x Velocity

Question 10

Equation for Kinetic Energy

Answer 10

Kinetic Energy = 0.5 x Mass x (Speed)2

Question 11

Equation for Gravitational Potential Energy

Answer 11

Gravitational Potential Energy = Mass x Gravitational Field Strength(g) x Height

Question 12

Equation for Power involving Energy and Time

Answer 12

Power = Energy Transferred / Time

Question 13

Equation for Power involving Work and Time

Answer 13

Power = Work Done / Time

Question 14

Equation for Efficiency

Answer 14

Efficiency = Useful Output Energy / Total Input Energy